c++ - 求助：这个正则表达式是什么含义？

Question

([^\^]*?)($$.*$$|\{.*\}|)*(@\w+|)(=|[\+\-\*/\%]=)(.*)

高洛峰 · Answer

https://regex101.com/r/wM6hD6/1
matches strings like aaa[bbb]@ccc=ddd,{aaa}@bbb+=ccc. I don’t know what it is used for.

PHPz · Answer

If you use a picture to express it, this is what it means. Please compare it: